YogaRat XrossFlex Long-Sleeve, UPF 50+ Men&rsquo;s Amphibious Tech T-Shirt, Compression Sleeves Great for active pursuits on land or water and as a base layer, yet perfect when traveling and stylishly tailored for casual wear Ultra Light and Fast Drying UPF 50+ sunblock woven into the fabric won't wash out Compression sleeves at forearms allow the shirt to flex and stay with you in water and wind Great-feeling technical fabric (84% polyester, 16% spandex) keeps you cool and wicks moisture way better than cotton